Charles baxter



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Ja WA NITED STATES y l PATENT OFFICE.

CHARLES BAXTER, OF LONDON, ENGLAND, ASSIGNOR OF ONE-HALF TO FREDERICKPERTWEE, OF SAME PLACE.

SPANNER.

SPECIFICATION forming part of Letters `Patent No. 625,716,1dated May'23, 1899. Application filed August 19 1898. Serial No. 689,041. (Nomodel.)

To all whom it may concern: i

Beit known that I, CHARLES BAXTER, asubject of the Queen of GreatBritain, residing at London, England, have invented new and usefulImprovements in Spanners, (for which I have applied for a patent inGreat Britain, No. 15,411, dated July 13, 1898,) of which the followingis a specification.

My invention relates to an improved clawspanner provided with means foradjusting the same to suit nuts of different sizes.

A spanner constructed according to myinvention has a frame to which thelever portion of the Spanner is fixed, and in this frame is pivoted aplate which forms one of the jaws of the Spanner, the other jaw of theSpanner being formed by an arm which is also .pivoted in the frame andthe free endof which coperates with a face upon the plate forming thefirst-mentioned jaw disposed at an angle to the nut-engaging portion ofsaid jaw in such a manner that when the said iirst-mentioned jaw ismoved the other jaw will follow the movement, so that the adjacentsurfaces of the two jaws will remain practically' parallel. As theangular face upon one jaw will only move the other jaw in one direction,suitable means, such as a link, are arranged between the two jaws insuch a manner that the movement imparted to the one will be communicatedto the other. To the pivoted plate is connected a screw-rod or otherdevice for adjusting the spanner.

In the accompanying drawings, Figure 1 is a sectional side elevation ofa Spanner made according to my invention. Fig. 2 is an edge viewthereof. Fig. 3 is a section on the line 3 3, Fig. 1; and Fig. 4 is asection on the line 4 4, Fig. 1. I

a is the head portion, and b the hand portion, of the frame of thespanner. The main jaw c consists of a plate -pivoted to the head portionof the frame at c2 and having a broad' nut-engaging face c and a face edisposed at an angle to the nut-engaging face. (l represents the secondjaw, pivoted at d2 to the head portion of the frame and provided withV abroad nut-engaging face d. The free end of the second jaw d engages theface e of the main jaw and slides thereon when the main jaw is moved, sothat the nut-engagingportions of the two jaws will always remain parallel.

f is the screw-rod, by means of which the plate c is moved to adjust thespanner to take lany particular nut, the said screw-rod f being aroundits pivot, as shown by the broken lines l in Fig. 1, the movement of thesaid pivoted plate c causing the arm CZ to correspondingly move byreason of the contact of its free end with the inclined surface c,formed upon the said plate c, so that the two jaws c' and d remainparallel with one another whatever the position to which the pivotedplate c is moved by the said screw-rod f. The angular face e on thepivoted plate c only operates the arm d in one direction, and to enablethe free end of the arm CZ to bear against the said angular face at anyposition ot' the pivoted plate suit able means are provided, ashereinbefore mentioned. Such means preferably consist of the spring-linkg, which connects the arm d andthe pivoted plate c, as clearly shown,the said link g being made elastic to counteract any inequality in therelative movements of the free end of the arm cl and the points ofattachment of the said link g.

Having now particularly described and ascertained the nature of my saidinvention and in what manner the same is to be performed,

`I declare that what I claim isa 1. A spanner comprising among itsmembers a frame, a `j aw pivoted to said frame and having a facedisposed at an angle to the nutengaging portion of the jaw, a second jawpivoted to the frame, and having its free end engaging said angularface, and adjusting mechanism for said first-mentioned jaw,substantially as described.

2. A Spanner comprising among its members a frame, a jaw pivoted to saidframe and provided with a face disposed at an angle to the nut-engagingportion of the jaw, a second jaw pivoted to the frame and having itsfree end engaging the said angular face, adjusting meehanisnl connectedwith the first-mentioned jaw, and an operative connection bev tween saidjaws, substantially as described.

3. A spannei1 Comprising among its members a frame, a jaw pivoted to theframe, and 1 provided with a face disposed angularly to the nut-engagingportion of the jaw, a second jaw 1o pivoted to the frame ad jacent tothe point of pivoting of the rst-mentioned jaw and having its free endengaging said inclined face,

an elastic link'eonneeting said jaWs,.a serew-

